On Mon, Aug 19, 2013 at 4:45 PM, Jian Qiu <[email protected]> wrote:
> Jesse, > > Thanks for your quick response. > > Which version would you recommend upgrade to? As you know, this is our > production environment, stability is the first priority. > > May I upgrade the userspace programs only? We might not be able to upgrade > kernel module as replacing kernel module may require a server reboot and we > couldn't stop the running service on it. > If you upgrade OVS from one released version to the immediate next one, I don't think you will need a reboot. A "force-reload-kmod" should be good enough. You can continue doing this till you reach the last released branch. ( I think you can skip a few released branches in between that have the userspace - kernel module compatibility). > Many thanks! > > Jian Qiu > > > > On Tue, Aug 20, 2013 at 12:29 AM, Jesse Gross <[email protected]> wrote: > >> On Mon, Aug 19, 2013 at 6:39 AM, Jian Qiu <[email protected]> wrote: >> > Hi, >> > >> > We deployed openvswitch 1.4.6 on CentOS 6.4 in our production >> envioronment. >> > OVS were used to bridge KVM VMs. >> > >> > Recently, we found some VMs lost network connections randomly. When the >> > event happened, we login into the VMs through VNC console and found the >> ARP >> > tables were full of incomplete entries. It seemed that the ARP packets >> > in/out of the VMs were being dropped. >> > >> > We checked the ovs-vswitchd message logs when the network disconnection >> > happened, we found most of the messages complained high CPU usage of >> > ovs-switchd and "dropped log messages". (Samples are attached at the >> end of >> > email) >> > >> > I'm writing the email for your kind help. >> > >> > 1. Did the "dropped log messages" cause the VMs losing network >> connections? >> >> No, it just means that the log messages have been rate limited. >> >> > 2. Is there any quick fix to this issue except replacing the OVS kernel >> > module as we couldn't reboot the hypervisor? >> >> Not a quick fix but newer versions of OVS will likely improve your >> performance. >> > > > _______________________________________________ > discuss mailing list > [email protected] > http://openvswitch.org/mailman/listinfo/discuss > >
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